Update to use root_group for CP 9 compatibility

Author: prcutler

examples/clue_ams_remote_advanced.py

@@ -84,7 +84,7 @@
 volume_inner = Rect(15, 170, 1, 20, fill=0xFFFFFF, outline=0xFFFFFF)
 group.append(volume_inner)
 
-display.show(group)
+display.root_group = group
 time.sleep(0.01)
 
 width1 = 1

examples/clue_ble_color_patchwork.py

@@ -207,7 +207,7 @@ def change_advertisement(color):
 group.append(patchwork_group)
 
 # Add the Group to the Display
-display.show(group)
+display.root_group = group
 
 cur_color = 0
 

examples/clue_spirit_level.py

@@ -23,7 +23,7 @@
 bubble_group.append(level_bubble)
 
 clue_group.append(bubble_group)
-display.show(clue_group)
+display.root_group = clue_group
 
 while True:
     x, y, _ = clue.acceleration